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- (No Model.) 2 .Sheets -Sheet 2.

v. 'W. BLANCHARD. STEAM CONDENSER- AND AIR HEATER. 11 ,413,915. Pateintfed 001;.29, 1889.

WITNESSES ZJVVENTOB;

r 4 a. a; I Attorney N. PETERS. Phulo-Lhbcgmphar. Wilb'mgim 0.0.

UNITED STATES PATENT 'FFICE.

VIRGIL W. BLANOI IARD, OF NEW YORK, N. Y., ASSIGNOR TO JOSEPH A.

' DAVIS, OF SAME PLACE.

STEAM-CONDENSER AND AlR-HEATER.

SPEGIFIGATION forming part of Letters Patent No, 413,915, dated October 29, 1889.

Application filed April 1 1, l 8 8 To all whom it may concern.- I it Be it known that I, VIRGIL W.- BLANCHARD,

of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Steam-Condensers and Air-Heaters for Steam -Boilers; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying draw-v ings, and tothe letters of reference marked thereon, which form part of this specifica tion, in which Figure 1'- represents a perspective viewof my improved steam -boiler-furnace plant, parts of the apparatus being broken away to more clearly indicate the construction. Fig! 2 is a sectional view of the condensers and air-drum. V

This invention has for its objects to provide a steam-boiler furnace with novel and improved devices for condensing the exhaust-steam and feeding the resultant Water ata heat nearly equaling the boiling-point into the force-pump that supplies the boiler, and to then heat this water of condensation by the exhaust-steam to a temperature at or near the temperature of the exhaust-steam as it leaves the cylinder of the engine,'an d, fur-. ther, to provide improved air-heating devices for raising the temperature of the airsup plied to the furnace, and, finally, to provide means whereby a portion of the carbonicacid gas escaping from the furnace may be returned and utilized to regulate the heat of the furnace, or recarbonized and again injected into the combustion-chamber thereof for oxidation; v

The invention further consists in certain novel details of construction and arrangement of parts, hereinafter described and claimed.

Referring by letter to the drawings, A designates a rectangular casing, which is formed of heat-non-conducting walls suitably constructed, and which contains a furnace for generatinga high degree of heat, and also a steam-generator, preferably of the tubular kind, which furnace and boiler are partly shown by breaking away the walls of casing A.

A designates the air-heater, which com- Serial 1%. 306.899. (No model.)

.municates with the casing A by a flue a,vand which is'provided interiorly with numerous vertical pipes a, secured to heads a for the passage of the products of combustion, and out-side these flues a chamber is formed, broken up by horizontal partitions arranged to cause the descending air-currents, which are forced therethrough, to take a tortuous course, the air being heated in its passage therethrough 1 by contact with the flues a. On' top of the air-heater A is a gas trap or chamber A in which the carbonic-acid gas rising with the products of combustion and terminal gases through the chimney is trapped by its" greater specific gravity, as fully described in my application for improvements in gasmp filed April 6, 1889, Serial No.

306,202. On top of trap A is .a small airheater A constructed like the heater A, and designed for heating air and as auxiliary to heater A as hereinafter set forth.

E designates an air-forcing engine pro vided with a pipe E leading intothe upper end of the heater A and having a branch E leadinginto the heater A near its top. From the lower end of heater A the air is conducted through a pipe F, under pressure, to a secondary blast-pipe f, having a branch f leading into the combustion-chamber of the furnace, and a branch f leading into the ashpit, both of said branches being properly valved, so that the attendant can regulate or cut off the air-supply through either branch.

The pipe F also communicates with a pipe f provided with a hopper and a screw-feeder for pulverized fuel, and a regulating-cock f. Between the hopper and furnace a pipe 9 rises from pipe f and is provided with a regulating-cock g. Said pipe communicates with the upper part of the furnace, and is used to introduce gases therein, as hereinafter shown.

Gr designates a forcing and exhausting engine or blower communicating by a valved pipe 9 with the pipe f and by means of a pipe g withahorizontal gas-heaterand steamcond enser C, mounted on top of the casing A. Beside condenser C is a steam-condenser and air-heater D, and each of these'is constructed and intermediate zigzag channels, like heater ICO A. Above condensers C D is a steam-drum E, communicating with the boiler, and above this drum a cold-water condenser F H designates a water heater and purifier communicating with the exhaustrpipe of the main steam-engine, (not shown,) and by a valved pipe 7L with the steam-space of condenser C, and this condenser in turn communicates with the steam-space of condenser D by a pipe h, which latter connects by a pipe 7L2 with the cold-water condenser F The exhaust-steam entering heater H escapes therefrom into condenser O, end thence into condensers D and F where its complete condensation is effected, producing, as a result, a partial vacuum, which assists in drawing the steam from heater H. From these several condensers the water of condensation is drawn by pump H through a pipe H and branches H H as shown. Condenser F is supplied with a continuous current of cold water introduced therein by a pipet'and conducted'off by a pipe i. Pump H forces the water drawn from the condensers through a pipe 7L5 into a coil h in heater H, from which it escapes by a pipe h to the boiler. The steam and Water are thus in a closed circuit, the steam passing from the boiler to the engine, being taken thence to the water-heater H, and thence to the condensers, and after reconversion into hot water is forced back into the boiler at a high heat. The water passing through coil 7L6 is subjected to the heat of the exhaust-steam fresh from the engine at or near the termination of said coil, and is raised to a heat equal or nearly equal to that of the exhaust-steam. The other chamberin condenser C communicates bya pipe C with the bottom of gas-trap A and also with a blower-engine G, which in turn communicates by pipe 9 with the pipes f and 9 gas forced through pipe 0 may be directed into pipe or into pipe f and into branch pipe f to mingle with the air, or forced beneath the grate independently of the air-blast. The carbonic-acid gas removed from the trap is cool and assists in condensing the steam in its passage through condenser C, and is in turn heated thereby.

The air-chamber in condenser D is connected at one end by a pipe D with pipe E and at its other end by a pipe D with the upper end of the air-heater A, and it is also connected by a valved pipe D to the lower end of heaterA. hen pump E is started, aircan be forced up into heaterA through the same into condenser D, through the latter into heaterA, and from the latter to the furnace, or by shifting the valves the heater A can be cut out of the circuit, or both heater A and condenser D may be cut out. thus able to effectually heat and regulate the temperature of the air delivered to the furnace. The carbonic-acid gas drawn from the trap may be used to temper the heat of the furnace, but is preferably employed to in- These pipes are so valved that the I amcrease the heat thereof by admitting it beneath the grate and forcing it through the bed of incandescent fuel thereon. In its passage through the latter the carbonic-acid gas is recarbonized and converted into carbonlcoxide gas, which is consumed in the fire-chambers above the grate by introducing oxygen or air therein, thus intensifying the heat of the furnace.

The water-heater herein referred to forms the subject-matter of an application for Letters Patent filed by me April 11, 1889, Serial No. 306,803, and is not herein specifically claimed.

Having thus described my invention, I claim- 1. The combination, with a steam-boiler, of an air-heaterA, the steam condenser and air-heater communicating with heater A, the air-forcing pump, and the water-pump and exhaust-steam supply, all substantially as described.

2. The combination, with the furnace and boiler, of the condensers C D, the pump communicating therewith, and the exhaust-steam supply thereto, with the air-heater A, the gas-trap A and the pipes connecting the condensers with the heaters and gas-trap, and the engines E and G, all constructed and arranged substantially as specified.

3. The combination, with the steam-boiler furnace, of the condensers C, D, and F and the Water-heater H, the pump H, communicating with the said condensers and with a coil in heater H, and the exhaust-steam supply to said heater, all substantially as and for the purpose set forth.

4. The combination, in a steam-boiler furnace, of the air-heater A and gas-trap A with the steam-condenser O, communicating with the gas-trap and with an exhaust-steam supply, the steam-condenser D, communicating with heater A and condenser C, and the air, gas, and water forcing engines, all constructed and connected substantially as and for the purpose specified.

5. The combination of the condensers C, D, and F and the exhaust-steam supply thereto, with the pump H, and the pipe H and its branches H H and the connections between said pump and boiler, all constructed and arranged substantially as specified.

6. The combination, in a steam-boiler furnace, of the air-heaters A A the condensers O and IF, the air-pump E, and water-pump H and heater H, all substantially as and for the purpose set forth.

7. The combination of the heaters A A and gas-trap A with the condensers C and D, water-heater H, the air and gas forcing engines, and the pump H, substantially as and for the purpose described.

8. The combination, with the steam-boiler furnace and the air-heater and gas-trap, constructed substantially as described, of the air and gas forcing engines, the air and gas 413,915- I v a supply pipes F and g and the valved branch In testimonythatlclaimthe foregoing as my IQ pipes connecting therewith, all constructed own I affix my'signature 'in presence of two and arranged substantially as specified. Witnesses.

9. The combination, Withthe furnace and a v l 5 boiler, theair-heaters A Aiand Water- VIRGIL W. BLANCHARD. heater H, of the gas-trap A the condensers I O, D,'and F and the air, gas, and water 'Witnesses: pumps, and pipe-connections, all substan- W. R. KEYWORTH, tially as and for the pupose set forth. F. O. MCCLEARY. 

